In response to questions regarding the policy on heat / humidity, the league follows the OSA recommendations and here is an extract from the GLSL Procedural Agreement covering this:
"During a “Heat Wave” Game Officials will confer with Coaches and Team Officials before the start of the game in
regards to providing water-breaks, consider shortening the time played or postponing the game if both coaches agree to
do so. During games, Game Officials are encouraged to incorporate a water-break during injury stoppages, penalty
kicks, goal kicks, and other appropriate stoppages, etc., to address this concern of ensuring the health and safety of our
Conditions can vary depending upon field locations, start time, conditions, etc., so it is best to discuss how to handle the heat before the game starts.